Rarity: Uncommon

Turns Needed: 10

Card Type: Enchantment
Card Life: 48 hours
Curse Target: Fleet

Description:
If target fleet loses a battle, you lose 50% less fame.

I'd go a step further :

Rarity : Uncommon

Name : Incognito

Turns needed : 18

Card Type : Enchantment
Card life : 72 hours
target : Player

Description : The player is exempted from any fame gain or loss for the period of enchantment.

Nefarious is good....but incognito is a bit too overpowered and it destroys the main point in the game. If players start casting that card, then yeah it will help them, but what about the other players? They expect receiving SOME fame, even it its halved, after they spend turns attacking you. After all, that is the main catch in the game: you take from others but others can take from you.

As a player who actually cares about fame, I think that the card life shouldn't be on a time limit solely.

I propose that the life be changed to either having a maximum for how much lost fame you can prevent as well.

Example: X (#X) casted Nefarious! X became immune to fame loss for x00,000 fame points!

I think that you should be able to lose half up until x00,000 then you lose max in one attack but it also has a limit of x00,000 that can be lost with the card in place then the card is used up

I think the original post is the more balanced version of these suggestions, but since the percentage is 50% the turns should be a bit more than 10 in my opinion. 15-ish maybe?